Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Verkerk, Philippe"'
We present a 3D theoretical comparison between the radiation-pressure forces exerted on an atom in an isotropic light cooling scheme and in a six-beam molasses. We demonstrate that, in the case of a background vapor where all the space directions of
Externí odkaz:
http://arxiv.org/abs/1705.09646
Publikováno v:
Phys. Rev. E 94, 052212 (2016)
Dense cold atomic clouds have been shown to be similar to plasmas. Previous studies showed that such clouds exhibit instabilities induced by long-range interactions. However they did not describe the spatial properties of the dynamics. In this Letter
Externí odkaz:
http://arxiv.org/abs/1602.06181
Publikováno v:
Phys. Rev. A 89, 053425 (2014)
Magneto-Optical Traps have been used for several decades. Among fundamental mechanisms occuring in such traps, the magnitude of the multiple scattering is still unclear. Indeed, many experimental situations cannot be modeled easily, different models
Externí odkaz:
http://arxiv.org/abs/1402.6462
The cloud of cold atoms produced by a Magneto-Optical Trap is known to exhibit instabilities. We examine in this paper in which limits it could be possible to realize an experimental trap similar to the configurations studied theoretically, i.e. main
Externí odkaz:
http://arxiv.org/abs/1305.2688
An exhaustive kinetic model for the atoms in a 1D Magneto-Optical Trap is derived, without any approximations. It is shown that the atomic density is described by a Vlasov-Fokker-Planck equation, coupled with two simple differential equations describ
Externí odkaz:
http://arxiv.org/abs/1007.5380
Autor:
Hennequin, Daniel, Verkerk, Philippe
The dynamics of cold atoms in conservative optical lattices obviously depends on the geometry of the lattice. But very similar lattices may lead to deeply different dynamics. For example, in a 2D optical lattice with a square mesh, the sign of the de
Externí odkaz:
http://arxiv.org/abs/0906.2842
Autor:
Hennequin, Daniel, Verkerk, Philippe
We examine here the classical dynamics of cold atoms in square optical lattices, i.e. lattices obtained with two orthogonal stationary plane waves. Contrary to much of the past studies in this domain, the potential is here time independent and non di
Externí odkaz:
http://arxiv.org/abs/0906.2121
Autor:
Courtade, Emmanuel, Houde, Olivier, Clément, Jean-François, Verkerk, Philippe, Hennequin, Daniel
Publikováno v:
Physical Review A 74 (20/09/2006) 031403(R)
We propose a new geometry of optical lattice for cold atoms, namely a lattice made of a 1D stack of dark ring traps. It is obtained through the interference pattern of a standard Gaussian beam with a counter-propagating hollow beam obtained using a s
Externí odkaz:
http://arxiv.org/abs/physics/0609073
Autor:
Verkerk, Philippe, Hennequin, Daniel
A new geometry of optical lattice is proposed, namely a lattice made of a 1D stack of ring traps. It is obtained though the interference pattern of two counterpropagating beams: one of the beam is a standard gaussian beam, while the other one is a ho
Externí odkaz:
http://arxiv.org/abs/physics/0306155
The cloud of cold atoms obtained from a magneto-optical trap is known to exhibit two types of instabilities in the regime of high atomic densities: stochastic instabilities and deterministic instabilities. In the present paper, the experimentally obs
Externí odkaz:
http://arxiv.org/abs/physics/0306095